package wodegua.d1_helloworld;

public class HelloWorld {
    public static void main(String[] args) {
        String s = "张无忌,周芷若,赵敏";
        String a1 = "abc";
        String a2 = "a" + "b" + "c";
        System.out.println(s.length());
        System.out.println(s.charAt(1));
        for (int i = 0; i < s.length(); i++) {
            System.out.println(s.charAt(i));
        }
        char[] ss = s.toCharArray();
        for (int i = 0; i < ss.length; i++) {
            System.out.println(ss[i]);
        }
    }
}
